<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        *{margin:0;padding:0}
        a{text-decoration: none}
        ul{
            list-style: none;
            line-height: 50px;
            background: pink;
        }
        .row::after{
            content:"";
            display: table;
            clear:both;
        }
        li{
            width:100px;
            float:left;
            text-align: center;
        }
        .drop-content a{
            display: block
        }
        li:hover{
            background: deeppink;
        }
        .drop-content{
            display: none;
        }
        .dropMenu:hover .drop-content{
            display: block
        }
    </style>
</head>

<body>
    <ul class="row">
        <li class="dropMenu">
            收藏夹
            <div class="drop-content">
                <a href="">收藏宝贝</a>
                <a href="">收藏店铺</a>
            </div>
        </li>
        <li>卖家中心</li>
        <li>联系客服</li>
    </ul>
</body>

</html>